Each Spring the Northern Forest Management Company Needs Extra Tree

Essay

Each spring the Northern Forest Management Company needs extra tree fallers. This means that each spring 50 temporary workers are hired for a 12-week period, working 40 hours per week at $11 per hour, and then they are laid off.
Please advise your thoughts on whether there is any advantage to asking 200 of the 500 permanent employees of Northern Forest Management - who make $18 per hour - to work 2 hours of overtime each workday of that 12 weeks, rather than hiring the temporary workers?